Ship&#39;s rudder.



No. 640,836. Patented Ian. 9, I900.

T. V. TREW.

SHIPS RUBBER. (Application filed July 6, 1899.)

(No Model.)

UNITED STAT S PATENT OFFICE.

THOMAS VERNON TREW, OF LONDON, ENGLAND.

SHIPS RUDDER.

SPECIFICATION forming part of Letters Patent No. 640,836, dated January 9, 1900.

Application filed July 6, 1899.

To all whom, it may concern.-

Be it known that I, THOMAS VERNON Tnnw, a subject of the Queen of Great Britain, and a resident of Dulwich, London, England, have invented certain new and useful Improvements in Ships Rudders, (for which I have applied for a patent in Great Britain, No. 12,043, dated June 9, 1899,) of which the following is a full, clear, and exact specification thereof.

This invention relates to improvements in ships rudders, the object being to enable the rudder to be lifted and removed without disturbing the rudder head or stock. The rudder is made separate from the head or stock,

and the invention consists in the improved method of connecting the rudder to the head. For this purpose the lower part of the head or stock is forged with the fork projecting aft, into which the upper part of the rudder enters as it is being shipped into place. The rudder head or stock then becomes as one and can be turned about by the machinery on deck in the ordinary way. The rudder is held in its place in the usual manner with pintles and braces.

For the purpose of illustration I will now refer to the annexed drawings, in which-- Figure l is a side elevation showing my invention. Fig. 2 is a cross-section through line X Y in Fig. 1.

Ct is a rudder-blade which is provided with pintles b, which engage in the socket-pieces o. d is known as a head and is provided with the forged piece 6, which is forked, as shown. The top of the rudder-blade a passes between these forks e and is provided with the shoulder-piece f, so arranged as to prevent the opening of the forks 6 when the rudsel-ni No. 722,973. (No model.)

der is in use. By this arrangement it will be seen that the necessity for bolting the blade to the head (1 is avoided, thus preventing the necessity of removing the head when it is required to remove the rudder-blade. The removal or shifting of the headis aserious objection, owing to the necessity of removing, inthe case of steam steering-gear, the various parts.

I am aware that various arrangements have been employed for the purpose of enabling without necessitating the moving or shifting of this head; but the object of my invention is to enable this removal to take place and also to provide the means by which the spreading of the forked piece upon the head is avoided without the employment of bolts.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, is-- In means for enabling rudder-blades to be removed from the head or stock, in combination, a fork upon the head or stock adapted to receive the rudder-blade, projections or shoulders upon said rudder-blade adapted to engage upon the exterior of the fork which is slotted, for the purpose of preventing the spreading of the fork when the rudder-blade is in use, substantially as described and illustrated herein and for the purpose set forth.

In testimony that I claim the foregoing I have hereunto set my hand this 9th day of June, 1899.

THOMAS VERNON TREW.

Witnesses:

J AMES FLEMING, S. ORAUsAR.

the rudder-blade to be removed from the head 

